Albert Barnes Commentary 2 Samuel 6:12

"And it was told king David, saying, Jehovah hath blessed the house of Obed-edom, and all that pertaineth unto him, because of the ark of God. And David went and brought up the ark of God from the house of Obed-edom into the city of David with joy." — 2 Samuel 6:12 (ASV)

With gladness—Especially with joyful music and song (1 Chronicles 15:16 and following).